Bisphenol A (BPA) is a chemical used to make polycarbonate plastics. Polycarbonate plastics are used in
certain food and drink packaging such as baby bottles, water bottles, and other drink containers. People
are exposed to BPA when they drink from these containers because the BPA migrates from the container
into the beverage. Studies have shown that the ingested BPA may affect the brain, behavior, and
reproductive development in fetuses, infants, and children
What is the scientific claim being made in this paragraph about BPA?
O BPA is a chemical used to make polycarbonate plastics.
O Polycarbonate plastics are used to make baby bottles and water bottles.
BPA is not harmful to children or adults.
Ingested BPA may affect the brain, behavior, and reproductive development in fetuses, infants, and
children.

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !

we need to know the time interval during which the force acts. impulse of force = momentum change